X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/7a0db73e6faa349ef6dac9a8c5efe9f95fe4d994..3f7ca628535da8ee4296061580cc9a944bcf4ab4:/data/c.m4 diff --git a/data/c.m4 b/data/c.m4 index c4942555..71bcb28d 100644 --- a/data/c.m4 +++ b/data/c.m4 @@ -18,34 +18,15 @@ m4_divert(-1) -*- Autoconf -*- # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301 USA - ## ---------------- ## ## Identification. ## ## ---------------- ## -# b4_copyright(TITLE, YEARS) -# -------------------------- -m4_define([b4_copyright], -[/* A Bison parser, made by GNU Bison b4_version. */ - -/* $1, - Copyright (C) $2 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */]) - +# b4_comment(TEXT) +# ---------------- +m4_define([b4_comment], [/* m4_bpatsubst([$1], [ +], [ + ]) */]) # b4_identification # ----------------- @@ -60,27 +41,30 @@ m4_define([b4_identification], [#]define YYSKELETON_NAME b4_skeleton /* Pure parsers. */ -[#]define YYPURE b4_pure +[#]define YYPURE b4_pure_flag + +/* Push parsers. */ +[#]define YYPUSH b4_push_flag /* Using locations. */ [#]define YYLSP_NEEDED b4_locations_flag ]) - ## ---------------- ## ## Default values. ## ## ---------------- ## -m4_define_default([b4_epilogue], []) - +# If the %union is not named, its name is YYSTYPE. +m4_define_default([b4_union_name], [YYSTYPE]) +# If the %name-prefix is not given, it is yy. +m4_define_default([b4_prefix], [yy]) ## ------------------------ ## ## Pure/impure interfaces. ## ## ------------------------ ## - # b4_user_args # ------------ m4_define([b4_user_args], @@ -91,7 +75,6 @@ m4_define([b4_user_args], # -------------- # If defined, b4_parse_param arrives double quoted, but below we prefer # it to be single quoted. -m4_define_default([b4_parse_param]) m4_define([b4_parse_param], b4_parse_param)) @@ -117,18 +100,11 @@ m4_define([b4_parse_param_use], ])dnl ]) + ## ------------ ## ## Data Types. ## ## ------------ ## - -# b4_ints_in(INT1, INT2, LOW, HIGH) -# --------------------------------- -# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise. -m4_define([b4_ints_in], -[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])]) - - # b4_int_type(MIN, MAX) # --------------------- # Return the smallest int type able to handle numbers ranging from @@ -142,7 +118,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) # b4_int_type_for(NAME) @@ -152,38 +128,15 @@ m4_define([b4_int_type], m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) +## ---------## +## Values. ## +## ---------## -## ------------------ ## -## Decoding options. ## -## ------------------ ## - - -# b4_error_verbose_if(IF-TRUE, IF-FALSE) -# -------------------------------------- -# Expand IF-TRUE, if errors are verbose, IF-FALSE otherwise. -m4_define([b4_error_verbose_if], -[m4_if(b4_error_verbose, [1], - [$1], - [$2])]) - - -# b4_location_if(IF-TRUE, IF-FALSE) -# --------------------------------- -# Expand IF-TRUE, if locations are used, IF-FALSE otherwise. -m4_define([b4_location_if], -[m4_if(b4_locations_flag, [1], - [$1], - [$2])]) - - -# b4_pure_if(IF-TRUE, IF-FALSE) -# ----------------------------- -# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise. -m4_define([b4_pure_if], -[m4_if(b4_pure, [1], - [$1], - [$2])]) - +# b4_null +--------- +# Return a null pointer constant. NULL infringes on the user name +# space in C, so use 0 rather than NULL. +m4_define([b4_null], [0]) ## ------------------------- ## @@ -228,7 +181,7 @@ m4_define([b4_token_enums], enum yytokentype { m4_map_sep([ b4_token_enum], [, ], - [$@]) + [$@]) }; #endif ])]) @@ -236,9 +189,10 @@ m4_map_sep([ b4_token_enum], [, # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------------- -# Output the definition of the tokens (if there are) as enums and #defines. +# Output the definition of the tokens (if there are any) as enums and, if POSIX +# Yacc is enabled, as #defines. m4_define([b4_token_enums_defines], -[b4_token_enums($@)b4_token_defines($@) +[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], []) ]) @@ -259,8 +213,8 @@ m4_define([b4_token_enums_defines], # Consider a C++ compiler to be modern if it defines __cplusplus. # m4_define([b4_c_modern], - [[(defined (__STDC__) || defined (__C99__FUNC__) \ - || defined (__cplusplus) || defined (_MSC_VER))]]) + [[(defined __STDC__ || defined __C99__FUNC__ \ + || defined __cplusplus || defined _MSC_VER)]]) # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- @@ -290,9 +244,9 @@ $1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl # Output the arguments ANSI-C definition. m4_define([b4_c_ansi_formals], [m4_case([$@], - [], [void], - [[]], [void], - [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])]) + [], [void], + [[]], [void], + [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])]) m4_define([b4_c_ansi_formal], [$1]) @@ -313,9 +267,9 @@ m4_define([b4_c_knr_formal_name], # Output the K&R argument declarations. m4_define([b4_c_knr_formal_decls], [m4_map_sep([b4_c_knr_formal_decl], - [ + [ ], - [$@])]) + [$@])]) m4_define([b4_c_knr_formal_decl], [ $1;]) @@ -331,7 +285,7 @@ m4_define([b4_c_knr_formal_decl], # ----------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_decl], -[#if defined (__STDC__) || defined (__cplusplus) +[#if defined __STDC__ || defined __cplusplus b4_c_ansi_function_decl($@) #else $2 $1 (); @@ -376,18 +330,22 @@ m4_define([b4_c_arg], ## Synclines. ## ## ----------- ## -# b4_syncline(LINE, FILE) +# b4_sync_start(LINE, FILE) # ----------------------- -m4_define([b4_syncline], -[m4_if(b4_synclines_flag, 1, - [[#]line $1 $2])]) - +m4_define([b4_sync_start], [[#]line $1 $2]) ## -------------- ## ## User actions. ## ## -------------- ## +# b4_case(LABEL, STATEMENTS) +# -------------------------- +m4_define([b4_case], +[ case $1: +$2 + break;]) + # b4_symbol_actions(FILENAME, LINENO, # SYMBOL-TAG, SYMBOL-NUM, # SYMBOL-ACTION, SYMBOL-TYPENAME) @@ -398,9 +356,9 @@ m4_define([b4_symbol_actions], m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl case $4: /* $3 */ b4_syncline([$2], [$1]) - $5; + $5; b4_syncline([@oline@], [@ofile@]) - break; + break; m4_popdef([b4_at_dollar])dnl m4_popdef([b4_dollar_dollar])dnl ]) @@ -422,11 +380,11 @@ m4_define_default([b4_yydestruct_generate], [[const char *yymsg], [yymsg]], [[int yytype], [yytype]], [[YYSTYPE *yyvaluep], [yyvaluep]][]dnl -b4_location_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl +b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl m4_ifset([b4_parse_param], [, b4_parse_param]))[ { YYUSE (yyvaluep); -]b4_location_if([ YYUSE (yylocationp); +]b4_locations_if([ YYUSE (yylocationp); ])dnl b4_parse_param_use[]dnl [ @@ -438,7 +396,7 @@ b4_parse_param_use[]dnl { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ default: - break; + break; } }]dnl ]) @@ -458,25 +416,28 @@ m4_define_default([b4_yy_symbol_print_generate], /*ARGSUSED*/ ]$1([yy_symbol_value_print], [static void], - [[FILE *yyoutput], [yyoutput]], - [[int yytype], [yytype]], - [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl -b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]dnl + [[FILE *yyoutput], [yyoutput]], + [[int yytype], [yytype]], + [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl +b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl m4_ifset([b4_parse_param], [, b4_parse_param]))[ { - YYUSE (yyvaluep); -]b4_location_if([ YYUSE (yylocationp); + if (!yyvaluep) + return; +]b4_locations_if([ YYUSE (yylocationp); ])dnl b4_parse_param_use[]dnl [# ifdef YYPRINT if (yytype < YYNTOKENS) YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); +# else + YYUSE (yyoutput); # endif switch (yytype) { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl [ default: - break; + break; } } @@ -487,10 +448,10 @@ b4_parse_param_use[]dnl ]$1([yy_symbol_print], [static void], - [[FILE *yyoutput], [yyoutput]], - [[int yytype], [yytype]], - [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl -b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]dnl + [[FILE *yyoutput], [yyoutput]], + [[int yytype], [yytype]], + [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl +b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl m4_ifset([b4_parse_param], [, b4_parse_param]))[ { if (yytype < YYNTOKENS) @@ -498,11 +459,11 @@ m4_ifset([b4_parse_param], [, b4_parse_param]))[ else YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); -]b4_location_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); +]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); YYFPRINTF (yyoutput, ": "); ])dnl [ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl -b4_location_if([, yylocationp])[]b4_user_args[); +b4_locations_if([, yylocationp])[]b4_user_args[); YYFPRINTF (yyoutput, ")"); }]dnl ])